Is there a simple way to merge 2 .PNG files into another .PNG file, using code behind?
I've searched the web and found some examples but they tend to be too complex and not fully compatible.
I'd like to load "Assets/src1.png", "Assets/src2.png" and merge them into a temporary file so I can use in a tile.
Thank you.
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We've got a system that takes in a large variety of PDFs from unknown sources, and then uses them as templates for new PDFs generated by Prawn.
Occasionally some PDFs don't work as templates for Prawn- they either trigger a generic Prawn error ("Prawn::Errors::TemplateError => Error reading template file. If you are sure it's a valid PDF, it may be a bug.") or the resulting PDF comes out malformed.
(It's a known issue that some PDFs don't work as templates in Prawn, so I'm not trying to address that here:
[1]
[2])
If I take any of the problematic PDFs, and manually re-save them on my Mac using Preview > Save As [new PDF], I can then always use them as Prawn templates without any problem.
My question is, is there some (open source) server-side utility I can use that might be able to do the same thing- i.e. process problematic PDFs into something Prawn can use?
Yarin, it at least partially depends on why the PDFs don't work in the first place. If you can use them after re-saving with Apple's (quite bad) preview PDF code, you should be able to get the same result using a number of different tactics:
-) Use an actual PDF library to open and save the PDF files (libraries from Adobe and Global Graphics come to mind). These are typically commercial products but (I know the Adobe library the best) they do allow you to open a file and save it, performing a number of optimisations in the process. The Adobe libraries are currently licensed through a company called DataLogics (http://www.datalogics.com)
-) Use a commercial product that embeds these libraries. callas pdfToolbox comes to mind (warning, I'm affiliated with this product). This basically gives you the same possibilities as the previous point, but in a somewhat easier to use package (command-line use for example).
-) Use an open source product. I'm not very well positioned to provide useful links for that.
There is another approach that may work depending on your workflow and files. In graphic arts bad files are sometimes "made better" by a process called re-distilling; you basically convert the PDF file to PostScript and re-distill the postscript into PDF again. Because this rewrites the whole file structure, it often fixes fundamental problems. However, it also comes with risks as you're going through a different file format. Libraries such as GhostScript (watch the licensing conditions) may allow you to do this.
Given that your files seem to be fixed simply by using preview, I would think a redistilling approach would be overly dangerous and overkill. I would look into finding a good PDF library that can automatically open and save your files.
I need to split PowerPoint presentation file (pptx and, if possible, ppt) into a set of original format files (pptx or ppt) – each containing one slide from the original. I need to do this programmatically on Linux Ubuntu server using free tools or external free API. When a file gets uploaded to a directory program will be called from my main program (written in PHP) and do the split.
I am looking for suggestions about language or set of tools to use. I looked at several options listed below. It will take some time to try all of them but if anyone could exclude or add to the list and/or provide code examples it would help.
Thanks!
(1) Apache POI project (POI-XSLF)
(2) OpenOffice unoconv command line utility
(3) C# (with compiler Mono for Linux). This may include indirect option of deleting slides with powerPoint.Slides(x).Delete
(4) JODConverter (Java OpenDocument Converter)
(5) PyODConverter (Python OpenDocument Converter)
(6) Google Documents API
(7) Aspose.Slides for .NET is out because of cost
When I had the same needs I ended up shelling and using "UNOCONV" to convert the files to PDF. And then used "PDFTK" to split the file by pages. Once that is done you should be able to take the extra step and convert the new split PDF files back to PPTX using one more UNOCONV.
While it seems rather complicated, PPTX seems to be "that one ooxml file no one wants to touch". Libraries seem to be few and incomplete mostly.
I need to create pdf reports in my app. I'm using asp.net mvc3. What's the best way to do this? I don't really want to use a reporting framework if i can avoid it, it's just a few reports, table layout, groupings, pagination possibly, totals, ability to merge pdfs into 1 pdf....any ideas? what would be ideal is if i could convert my html view into a pdf simply...
There is nothing built into .NET allowing to create PDF files. So you have two possibilities: write one yourself from scratch or use one that exists.
In case you decide to go with the second you may take a look at flying-saucer which along with ikvmc.exe could be used to convert XHTML files into PDF. I have blogged about some of the required steps in order to get this working.
Some possibilities:
I think you can do this with SQL Server reporting services (in SQL rather than a 3rd party reporting framework)
Low level PDF libraries that can be used: PDFSharp, iTextSharp.
You could print an html file to a postscript driver using word automation, then convert the PS to PDF via GhostScript
Is there a way to generate Excel spreadsheets with Perl on Linux so that I can open the spreadsheet on Windows and it creates native Excel graphics? I know that there are libs to draw graphics but all libs I know simply insert a picture to the Excel which looks weird when I open the spreadsheet on Windows. So I wondering is there a way to do it better? Possibly I could embed a VB script or something so that it creates a graphics automatically when I open the spreadsheet on Windows? The original spreadsheet must be generated on Linux so there are no ways to use OLE or some other Windows-only technology.
Thanks guys! Spreadsheet::WriteExcel seems to be a good solution. Did not understand at the first glance if it allows to change dimensions of data or it is hardcoded in a template file (10 points for example, no more, no less). Does anyone know?
If anyone knows another way of doing my task, please post it here. I'm interested in comparing of different solutions and select the best.
Yes, Spreadsheet::WriteExcel has a embed_chart($row, $col, $filename, $x, $y, $scale_x, $scale_y) function which lets you do this.
Spreadsheet::WriteExcel allows you to insert charts from existing files (with some caveats).
See, the following sub-document on Spreadsheet::WriteExcel Charts and the examples files in the distro, such as this one.
P.S. I am the author of that module.
Try Spreadsheet::WriteExcel.
Does anyone know of a program which works like a Adobe PDF Reader except for .NET solutions?
I develop in a virtual machine but there are times when I just want to open a solution and browse the files. I have no intention of doing any development, I just want to view them.
Does this app exist, or is Notepad++ my best option?
Thanks!
You might want to consider making a simple XSL Transform that can read the SLN and create pretty little list of files for you.. if that's what you mean, otherwise the XML is probably the best you are going to get.
Never heard of a "solution reader." When viewing source files on a system without VS.NET I use Notepad.